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Support for cbfs. Also factor out the part which is common

Browse source 
for all archives to a separate module. This splits tar from cpio
	as they are very different but keeps cpio, cpio_be, odc and newc
	together since they're very similar.
This commit is contained in:
Vladimir 'phcoder' Serbinenko 2013-06-16 00:06:13 +02:00
parent a5b55c4b32
commit 5027af38cf
15 changed files with 1285 additions and 454 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
ChangeLog
View file

@ -1,3 +1,10 @@
2013-06-15 Vladimir Serbinenko <phcoder@gmail.com>
Support for cbfs. Also factor out the part which is common
for all archives to a separate module. This splits tar from cpio
as they are very different but keeps cpio, cpio_be, odc and newc
together since they're very similar.
2013-06-15 David Michael <fedora.dm0@gmail.com>
* configure.ac (FREETYPE): Change AC_CHECK_PROGS to AC_CHECK_TOOLS.

2
Makefile.util.def
View file

@ -75,6 +75,8 @@ library = {
common = grub-core/fs/afs.c;
common = grub-core/fs/bfs.c;
common = grub-core/fs/btrfs.c;
common = grub-core/fs/cbfs.c;
common = grub-core/fs/archelp.c;
common = grub-core/fs/cpio.c;
common = grub-core/fs/cpio_be.c;
common = grub-core/fs/odc.c;

10
grub-core/Makefile.core.def
View file

@ -1145,6 +1145,16 @@ module = {
cppflags = '-I$(srcdir)/lib/posix_wrap -I$(srcdir)/lib/minilzo -DMINILZO_HAVE_CONFIG_H';
};
module = {
name = archelp;
common = fs/archelp.c;
};
module = {
name = cbfs;
common = fs/cbfs.c;
};
module = {
name = cpio;
common = fs/cpio.c;

4
grub-core/commands/nativedisk.c
View file

@ -78,8 +78,12 @@ get_uuid (const char *name, char **uuid, int getnative)
break;
/* Virtual disks. */
/* GRUB dynamically generated files. */
case GRUB_DISK_DEVICE_PROCFS_ID:
/* To access through host OS routines (grub-emu only). */
case GRUB_DISK_DEVICE_HOST_ID:
/* To access coreboot roms. */
case GRUB_DISK_DEVICE_CBFSDISK_ID:
/* GRUB-only memdisk. Can't match any of firmware devices. */
case GRUB_DISK_DEVICE_MEMDISK_ID:
grub_dprintf ("nativedisk", "Skipping native disk %s\n",

298
grub-core/fs/archelp.c Normal file
View file

@ -0,0 +1,298 @@
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2007,2008,2009,2013 Free Software Foundation, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/archelp.h>
#include <grub/err.h>
#include <grub/fs.h>
#include <grub/disk.h>
#include <grub/dl.h>
GRUB_MOD_LICENSE ("GPLv3+");
static inline void
canonicalize (char *name)
{
char *iptr, *optr;
for (iptr = name, optr = name; *iptr; )
{
while (*iptr == '/')
iptr++;
if (iptr[0] == '.' && (iptr[1] == '/' || iptr[1] == 0))
{
iptr += 2;
continue;
}
if (iptr[0] == '.' && iptr[1] == '.' && (iptr[2] == '/' || iptr[2] == 0))
{
iptr += 3;
if (optr == name)
continue;
for (optr -= 2; optr >= name && *optr != '/'; optr--);
optr++;
continue;
}
while (*iptr && *iptr != '/')
*optr++ = *iptr++;
if (*iptr)
*optr++ = *iptr++;
}
*optr = 0;
}
static grub_err_t
handle_symlink (struct grub_archelp_data *data,
struct grub_archelp_ops *arcops,
const char *fn, char **name,
grub_uint32_t mode, int *restart)
{
grub_size_t flen;
char *target;
char *ptr;
char *lastslash;
grub_size_t prefixlen;
char *rest;
char *linktarget;
*restart = 0;
if ((mode & GRUB_ARCHELP_ATTR_TYPE) != GRUB_ARCHELP_ATTR_LNK
|| !arcops->get_link_target)
return GRUB_ERR_NONE;
flen = grub_strlen (fn);
if (grub_memcmp (*name, fn, flen) != 0
|| ((*name)[flen] != 0 && (*name)[flen] != '/'))
return GRUB_ERR_NONE;
rest = *name + flen;
lastslash = rest;
if (*rest)
rest++;
while (lastslash >= *name && *lastslash != '/')
lastslash--;
if (lastslash >= *name)
prefixlen = lastslash - *name;
else
prefixlen = 0;
if (prefixlen)
prefixlen++;
linktarget = arcops->get_link_target (data);
if (!linktarget)
return grub_errno;
if (linktarget[0] == '\0')
return GRUB_ERR_NONE;
target = grub_malloc (grub_strlen (linktarget) + grub_strlen (*name) + 2);
if (!target)
return grub_errno;
grub_strcpy (target + prefixlen, linktarget);
grub_free (linktarget);
if (target[prefixlen] == '/')
{
ptr = grub_stpcpy (target, target + prefixlen);
ptr = grub_stpcpy (ptr, rest);
*ptr = 0;
grub_dprintf ("archelp", "symlink redirected %s to %s\n",
*name, target);
grub_free (*name);
canonicalize (target);
*name = target;
*restart = 1;
return GRUB_ERR_NONE;
}
if (prefixlen)
{
grub_memcpy (target, *name, prefixlen);
target[prefixlen-1] = '/';
}
grub_strcat (target, rest);
grub_dprintf ("archelp", "symlink redirected %s to %s\n",
*name, target);
grub_free (*name);
canonicalize (target);
*name = target;
*restart = 1;
return GRUB_ERR_NONE;
}
grub_err_t
grub_archelp_dir (struct grub_archelp_data *data,
struct grub_archelp_ops *arcops,
const char *path_in,
grub_fs_dir_hook_t hook, void *hook_data)
{
char *prev, *name, *path, *ptr;
grub_size_t len;
int symlinknest = 0;
path = grub_strdup (path_in + 1);
if (!path)
return grub_errno;
canonicalize (path);
for (ptr = path + grub_strlen (path) - 1; ptr >= path && *ptr == '/'; ptr--)
*ptr = 0;
prev = 0;
len = grub_strlen (path);
while (1)
{
grub_int32_t mtime;
grub_uint32_t mode;
grub_err_t err;
if (arcops->find_file (data, &name, &mtime, &mode))
goto fail;
if (mode == GRUB_ARCHELP_ATTR_END)
break;
canonicalize (name);
if (grub_memcmp (path, name, len) == 0
&& (name[len] == 0 || name[len] == '/' || len == 0))
{
char *p, *n;
n = name + len;
while (*n == '/')
n++;
p = grub_strchr (n, '/');
if (p)
*p = 0;
if (((!prev) || (grub_strcmp (prev, name) != 0)) && *n != 0)
{
struct grub_dirhook_info info;
grub_memset (&info, 0, sizeof (info));
info.dir = (p != NULL) || ((mode & GRUB_ARCHELP_ATTR_TYPE)
== GRUB_ARCHELP_ATTR_DIR);
if (!(mode & GRUB_ARCHELP_ATTR_NOTIME))
{
info.mtime = mtime;
info.mtimeset = 1;
}
if (hook (n, &info, hook_data))
{
grub_free (name);
goto fail;
}
grub_free (prev);
prev = name;
}
else
{
int restart = 0;
err = handle_symlink (data, arcops, name,
&path, mode, &restart);
grub_free (name);
if (err)
goto fail;
if (restart)
{
len = grub_strlen (path);
if (++symlinknest == 8)
{
grub_error (GRUB_ERR_SYMLINK_LOOP,
N_("too deep nesting of symlinks"));
goto fail;
}
arcops->rewind (data);
}
}
}
else
grub_free (name);
}
fail:
grub_free (path);
grub_free (prev);
return grub_errno;
}
grub_err_t
grub_archelp_open (struct grub_archelp_data *data,
struct grub_archelp_ops *arcops,
const char *name_in)
{
char *fn;
char *name = grub_strdup (name_in + 1);
int symlinknest = 0;
if (!name)
return grub_errno;
canonicalize (name);
while (1)
{
grub_uint32_t mode;
int restart;
if (arcops->find_file (data, &fn, NULL, &mode))
goto fail;
if (mode == GRUB_ARCHELP_ATTR_END)
{
grub_error (GRUB_ERR_FILE_NOT_FOUND, N_("file `%s' not found"), name_in);
break;
}
canonicalize (fn);
if (handle_symlink (data, arcops, fn, &name, mode, &restart))
{
grub_free (fn);
goto fail;
}
if (restart)
{
arcops->rewind (data);
if (++symlinknest == 8)
{
grub_error (GRUB_ERR_SYMLINK_LOOP,
N_("too deep nesting of symlinks"));
goto fail;
}
goto no_match;
}
if (grub_strcmp (name, fn) != 0)
goto no_match;
grub_free (fn);
grub_free (name);
return GRUB_ERR_NONE;
no_match:
grub_free (fn);
}
fail:
grub_free (name);
return grub_errno;
}

382
grub-core/fs/cbfs.c Normal file
View file

@ -0,0 +1,382 @@
/* cbfs.c - cbfs and tar filesystem. */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2007,2008,2009,2013 Free Software Foundation, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/misc.h>
#include <grub/disk.h>
#include <grub/archelp.h>
#include <grub/file.h>
#include <grub/mm.h>
#include <grub/dl.h>
#include <grub/i18n.h>
#include <grub/cbfs_core.h>
GRUB_MOD_LICENSE ("GPLv3+");
struct grub_archelp_data
{
grub_disk_t disk;
grub_off_t hofs, next_hofs;
grub_off_t dofs;
grub_off_t size;
grub_off_t cbfs_start;
grub_off_t cbfs_end;
grub_off_t cbfs_align;
};
static grub_err_t
grub_cbfs_find_file (struct grub_archelp_data *data, char **name,
grub_int32_t *mtime,
grub_uint32_t *mode)
{
grub_size_t offset;
for (;;
data->dofs = data->hofs + offset,
data->next_hofs = ALIGN_UP (data->dofs + data->size, data->cbfs_align))
{
struct cbfs_file hd;
grub_size_t namesize;
data->hofs = data->next_hofs;
if (data->hofs >= data->cbfs_end)
{
*mode = GRUB_ARCHELP_ATTR_END;
return GRUB_ERR_NONE;
}
if (grub_disk_read (data->disk, 0, data->hofs, sizeof (hd), &hd))
return grub_errno;
if (grub_memcmp (hd.magic, CBFS_FILE_MAGIC, sizeof (hd.magic)) != 0)
{
*mode = GRUB_ARCHELP_ATTR_END;
return GRUB_ERR_NONE;
}
data->size = grub_be_to_cpu32 (hd.len);
(void) mtime;
offset = grub_be_to_cpu32 (hd.offset);
if (mode)
*mode = GRUB_ARCHELP_ATTR_FILE | GRUB_ARCHELP_ATTR_NOTIME;
namesize = offset;
if (namesize >= sizeof (hd))
namesize -= sizeof (hd);
if (namesize == 0)
continue;
*name = grub_malloc (namesize + 1);
if (*name == NULL)
return grub_errno;
if (grub_disk_read (data->disk, 0, data->hofs + sizeof (hd),
namesize, *name))
{
grub_free (*name);
return grub_errno;
}
if ((*name)[0] == '\0')
{
grub_free (*name);
*name = NULL;
continue;
}
(*name)[namesize] = 0;
data->dofs = data->hofs + offset;
data->next_hofs = ALIGN_UP (data->dofs + data->size, data->cbfs_align);
return GRUB_ERR_NONE;
}
}
static void
grub_cbfs_rewind (struct grub_archelp_data *data)
{
data->next_hofs = data->cbfs_start;
}
static struct grub_archelp_ops arcops =
{
.find_file = grub_cbfs_find_file,
.rewind = grub_cbfs_rewind
};
static int
validate_head (struct cbfs_header *head)
{
return (head->magic == grub_cpu_to_be32_compile_time (CBFS_HEADER_MAGIC)
&& (head->version
== grub_cpu_to_be32_compile_time (CBFS_HEADER_VERSION1)
|| head->version
== grub_cpu_to_be32_compile_time (CBFS_HEADER_VERSION2))
&& (grub_be_to_cpu32 (head->bootblocksize)
< grub_be_to_cpu32 (head->romsize))
&& (grub_be_to_cpu32 (head->offset)
< grub_be_to_cpu32 (head->romsize))
&& (grub_be_to_cpu32 (head->offset)
+ grub_be_to_cpu32 (head->bootblocksize)
< grub_be_to_cpu32 (head->romsize))
&& head->align != 0
&& (head->align & (head->align - 1)) == 0
&& head->romsize != 0);
}
static struct grub_archelp_data *
grub_cbfs_mount (grub_disk_t disk)
{
struct cbfs_file hd;
struct grub_archelp_data *data;
grub_uint32_t ptr;
grub_off_t header_off;
struct cbfs_header head;
if (grub_disk_read (disk, grub_disk_get_size (disk) - 1,
GRUB_DISK_SECTOR_SIZE - sizeof (ptr),
sizeof (ptr), &ptr))
goto fail;
ptr = grub_cpu_to_le32 (ptr);
header_off = (grub_disk_get_size (disk) << GRUB_DISK_SECTOR_BITS)
+ (grub_int32_t) ptr;
if (grub_disk_read (disk, 0, header_off,
sizeof (head), &head))
goto fail;
if (!validate_head (&head))
goto fail;
data = (struct grub_archelp_data *) grub_zalloc (sizeof (*data));
if (!data)
goto fail;
data->cbfs_start = (grub_disk_get_size (disk) << GRUB_DISK_SECTOR_BITS)
- (grub_be_to_cpu32 (head.romsize) - grub_be_to_cpu32 (head.offset));
data->cbfs_end = (grub_disk_get_size (disk) << GRUB_DISK_SECTOR_BITS)
- grub_be_to_cpu32 (head.bootblocksize);
data->cbfs_align = grub_be_to_cpu32 (head.align);
if (data->cbfs_start >= (grub_disk_get_size (disk) << GRUB_DISK_SECTOR_BITS))
goto fail;
if (data->cbfs_end > (grub_disk_get_size (disk) << GRUB_DISK_SECTOR_BITS))
data->cbfs_end = (grub_disk_get_size (disk) << GRUB_DISK_SECTOR_BITS);
data->next_hofs = data->cbfs_start;
if (grub_disk_read (disk, 0, data->cbfs_start, sizeof (hd), &hd))
goto fail;
if (grub_memcmp (hd.magic, CBFS_FILE_MAGIC, sizeof (CBFS_FILE_MAGIC) - 1))
goto fail;
data->disk = disk;
return data;
fail:
grub_error (GRUB_ERR_BAD_FS, "not a cbfs filesystem");
return 0;
}
static grub_err_t
grub_cbfs_dir (grub_device_t device, const char *path_in,
grub_fs_dir_hook_t hook, void *hook_data)
{
struct grub_archelp_data *data;
grub_err_t err;
data = grub_cbfs_mount (device->disk);
if (!data)
return grub_errno;
err = grub_archelp_dir (data, &arcops,
path_in, hook, hook_data);
grub_free (data);
return err;
}
static grub_err_t
grub_cbfs_open (grub_file_t file, const char *name_in)
{
struct grub_archelp_data *data;
grub_err_t err;
data = grub_cbfs_mount (file->device->disk);
if (!data)
return grub_errno;
err = grub_archelp_open (data, &arcops, name_in);
if (err)
{
grub_free (data);
}
else
{
file->data = data;
file->size = data->size;
}
return err;
}
static grub_ssize_t
grub_cbfs_read (grub_file_t file, char *buf, grub_size_t len)
{
struct grub_archelp_data *data;
data = file->data;
return (grub_disk_read (data->disk, 0, data->dofs + file->offset,
len, buf)) ? -1 : (grub_ssize_t) len;
}
static grub_err_t
grub_cbfs_close (grub_file_t file)
{
struct grub_archelp_data *data;
data = file->data;
grub_free (data);
return grub_errno;
}
#if (defined (__i386__) || defined (__x86_64__)) && !defined (GRUB_UTIL)
static char *cbfsdisk_addr;
static grub_off_t cbfsdisk_size = 0;
static int
grub_cbfsdisk_iterate (grub_disk_dev_iterate_hook_t hook, void *hook_data,
grub_disk_pull_t pull)
{
if (pull != GRUB_DISK_PULL_NONE)
return 0;
return hook ("cbfsdisk", hook_data);
}
static grub_err_t
grub_cbfsdisk_open (const char *name, grub_disk_t disk)
{
if (grub_strcmp (name, "cbfsdisk"))
return grub_error (GRUB_ERR_UNKNOWN_DEVICE, "not a cbfsdisk");
disk->total_sectors = cbfsdisk_size / GRUB_DISK_SECTOR_SIZE;
disk->id = (unsigned long) "cbfs";
return GRUB_ERR_NONE;
}
static void
grub_cbfsdisk_close (grub_disk_t disk __attribute((unused)))
{
}
static grub_err_t
grub_cbfsdisk_read (grub_disk_t disk __attribute((unused)),
grub_disk_addr_t sector,
grub_size_t size, char *buf)
{
grub_memcpy (buf, cbfsdisk_addr + (sector << GRUB_DISK_SECTOR_BITS),
size << GRUB_DISK_SECTOR_BITS);
return 0;
}
static grub_err_t
grub_cbfsdisk_write (grub_disk_t disk __attribute__ ((unused)),
grub_disk_addr_t sector __attribute__ ((unused)),
grub_size_t size __attribute__ ((unused)),
const char *buf __attribute__ ((unused)))
{
return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
"rom flashing isn't implemented yet");
}
static struct grub_disk_dev grub_cbfsdisk_dev =
{
.name = "cbfsdisk",
.id = GRUB_DISK_DEVICE_CBFSDISK_ID,
.iterate = grub_cbfsdisk_iterate,
.open = grub_cbfsdisk_open,
.close = grub_cbfsdisk_close,
.read = grub_cbfsdisk_read,
.write = grub_cbfsdisk_write,
.next = 0
};
static void
init_cbfsdisk (void)
{
grub_uint32_t ptr;
struct cbfs_header *head;
ptr = *(grub_uint32_t *) 0xfffffffc;
head = (struct cbfs_header *) ptr;
if (!validate_head (head))
return;
cbfsdisk_size = ALIGN_UP (grub_be_to_cpu32 (head->romsize),
GRUB_DISK_SECTOR_SIZE);
cbfsdisk_addr = (void *) (grub_addr_t) (0x100000000ULL - cbfsdisk_size);
grub_disk_dev_register (&grub_cbfsdisk_dev);
}
static void
fini_cbfsdisk (void)
{
if (! cbfsdisk_size)
return;
grub_disk_dev_unregister (&grub_cbfsdisk_dev);
}
#endif
static struct grub_fs grub_cbfs_fs = {
.name = "cbfs",
.dir = grub_cbfs_dir,
.open = grub_cbfs_open,
.read = grub_cbfs_read,
.close = grub_cbfs_close,
#ifdef GRUB_UTIL
.reserved_first_sector = 0,
.blocklist_install = 0,
#endif
};
GRUB_MOD_INIT (cbfs)
{
#if (defined (__i386__) || defined (__x86_64__)) && !defined (GRUB_UTIL)
init_cbfsdisk ();
#endif
grub_fs_register (&grub_cbfs_fs);
}
GRUB_MOD_FINI (cbfs)
{
grub_fs_unregister (&grub_cbfs_fs);
#if (defined (__i386__) || defined (__x86_64__)) && !defined (GRUB_UTIL)
fini_cbfsdisk ();
#endif
}

1
grub-core/fs/cpio.c
View file

@ -53,7 +53,6 @@ read_number (const grub_uint16_t *arr, grub_size_t size)
GRUB_MOD_INIT (cpio)
{
grub_fs_register (&grub_cpio_fs);
my_mod = mod;
}
GRUB_MOD_FINI (cpio)

1
grub-core/fs/cpio_be.c
View file

@ -53,7 +53,6 @@ read_number (const grub_uint16_t *arr, grub_size_t size)
GRUB_MOD_INIT (cpio_be)
{
grub_fs_register (&grub_cpio_fs);
my_mod = mod;
}
GRUB_MOD_FINI (cpio_be)

487
grub-core/fs/cpio_common.c
View file

@ -23,68 +23,29 @@
#include <grub/disk.h>
#include <grub/dl.h>
#include <grub/i18n.h>
#include <grub/archelp.h>
GRUB_MOD_LICENSE ("GPLv3+");
#define ATTR_TYPE 0160000
#define ATTR_FILE 0100000
#define ATTR_DIR 0040000
#define ATTR_LNK 0120000
struct grub_cpio_data
struct grub_archelp_data
{
grub_disk_t disk;
grub_off_t hofs;
grub_off_t next_hofs;
grub_off_t dofs;
grub_off_t size;
#ifdef MODE_USTAR
char *linkname;
grub_size_t linkname_alloc;
#endif
};
static grub_dl_t my_mod;
static inline void
canonicalize (char *name)
{
char *iptr, *optr;
for (iptr = name, optr = name; *iptr; )
{
while (*iptr == '/')
iptr++;
if (iptr[0] == '.' && (iptr[1] == '/' || iptr[1] == 0))
{
iptr += 2;
continue;
}
if (iptr[0] == '.' && iptr[1] == '.' && (iptr[2] == '/' || iptr[2] == 0))
{
iptr += 3;
if (optr == name)
continue;
for (optr -= 2; optr >= name && *optr != '/'; optr--);
optr++;
continue;
}
while (*iptr && *iptr != '/')
*optr++ = *iptr++;
if (*iptr)
*optr++ = *iptr++;
}
*optr = 0;
}
static grub_err_t
grub_cpio_find_file (struct grub_cpio_data *data, char **name,
grub_int32_t *mtime, grub_disk_addr_t *ofs,
grub_uint32_t *mode)
grub_cpio_find_file (struct grub_archelp_data *data, char **name,
grub_int32_t *mtime, grub_uint32_t *mode)
{
#ifndef MODE_USTAR
struct head hd;
grub_size_t namesize;
grub_uint32_t modeval;
data->hofs = data->next_hofs;
if (grub_disk_read (data->disk, 0, data->hofs, sizeof (hd), &hd))
return grub_errno;
@ -118,153 +79,57 @@ grub_cpio_find_file (struct grub_cpio_data *data, char **name,
if (data->size == 0 && modeval == 0 && namesize == 11
&& grub_memcmp(*name, "TRAILER!!!", 11) == 0)
{
*ofs = 0;
*mode = GRUB_ARCHELP_ATTR_END;
grub_free (*name);
return GRUB_ERR_NONE;
}
canonicalize (*name);
data->dofs = data->hofs + ALIGN_CPIO (sizeof (hd) + namesize);
*ofs = data->dofs + ALIGN_CPIO (data->size);
#else
struct head hd;
int reread = 0, have_longname = 0, have_longlink = 0;
for (reread = 0; reread < 3; reread++)
{
if (grub_disk_read (data->disk, 0, data->hofs, sizeof (hd), &hd))
return grub_errno;
if (!hd.name[0] && !hd.prefix[0])
{
*ofs = 0;
data->next_hofs = data->dofs + ALIGN_CPIO (data->size);
return GRUB_ERR_NONE;
}
if (grub_memcmp (hd.magic, MAGIC, sizeof (MAGIC) - 1))
return grub_error (GRUB_ERR_BAD_FS, "invalid tar archive");
if (hd.typeflag == 'L')
static char *
grub_cpio_get_link_target (struct grub_archelp_data *data)
{
char *ret;
grub_err_t err;
grub_size_t namesize = read_number (hd.size, sizeof (hd.size));
*name = grub_malloc (namesize + 1);
if (*name == NULL)
return grub_errno;
err = grub_disk_read (data->disk, 0,
data->hofs + GRUB_DISK_SECTOR_SIZE, namesize,
*name);
(*name)[namesize] = 0;
if (data->size == 0)
return grub_strdup ("");
ret = grub_malloc (data->size + 1);
if (!ret)
return NULL;
err = grub_disk_read (data->disk, 0, data->dofs, data->size,
ret);
if (err)
return err;
data->hofs += GRUB_DISK_SECTOR_SIZE
+ ((namesize + GRUB_DISK_SECTOR_SIZE - 1) &
~(GRUB_DISK_SECTOR_SIZE - 1));
have_longname = 1;
continue;
{
grub_free (ret);
return NULL;
}
ret[data->size] = '\0';
return ret;
}
if (hd.typeflag == 'K')
static void
grub_cpio_rewind (struct grub_archelp_data *data)
{
grub_err_t err;
grub_size_t linksize = read_number (hd.size, sizeof (hd.size));
if (data->linkname_alloc < linksize + 1)
{
char *n;
n = grub_malloc (2 * (linksize + 1));
if (!n)
return grub_errno;
grub_free (data->linkname);
data->linkname = n;
data->linkname_alloc = 2 * (linksize + 1);
data->next_hofs = 0;
}
err = grub_disk_read (data->disk, 0,
data->hofs + GRUB_DISK_SECTOR_SIZE, linksize,
data->linkname);
if (err)
return err;
data->linkname[linksize] = 0;
data->hofs += GRUB_DISK_SECTOR_SIZE
+ ((linksize + GRUB_DISK_SECTOR_SIZE - 1) &
~(GRUB_DISK_SECTOR_SIZE - 1));
have_longlink = 1;
continue;
}
static struct grub_archelp_ops arcops =
{
.find_file = grub_cpio_find_file,
.get_link_target = grub_cpio_get_link_target,
.rewind = grub_cpio_rewind
};
if (!have_longname)
{
grub_size_t extra_size = 0;
while (extra_size < sizeof (hd.prefix)
&& hd.prefix[extra_size])
extra_size++;
*name = grub_malloc (sizeof (hd.name) + extra_size + 2);
if (*name == NULL)
return grub_errno;
if (hd.prefix[0])
{
grub_memcpy (*name, hd.prefix, extra_size);
(*name)[extra_size++] = '/';
}
grub_memcpy (*name + extra_size, hd.name, sizeof (hd.name));
(*name)[extra_size + sizeof (hd.name)] = 0;
}
data->size = read_number (hd.size, sizeof (hd.size));
data->dofs = data->hofs + GRUB_DISK_SECTOR_SIZE;
*ofs = data->dofs + ((data->size + GRUB_DISK_SECTOR_SIZE - 1) &
~(GRUB_DISK_SECTOR_SIZE - 1));
if (mtime)
*mtime = read_number (hd.mtime, sizeof (hd.mtime));
if (mode)
{
*mode = read_number (hd.mode, sizeof (hd.mode));
switch (hd.typeflag)
{
/* Hardlink. */
case '1':
/* Symlink. */
case '2':
*mode |= ATTR_LNK;
break;
case '0':
*mode |= ATTR_FILE;
break;
case '5':
*mode |= ATTR_DIR;
break;
}
}
if (!have_longlink)
{
if (data->linkname_alloc < 101)
{
char *n;
n = grub_malloc (101);
if (!n)
return grub_errno;
grub_free (data->linkname);
data->linkname = n;
data->linkname_alloc = 101;
}
grub_memcpy (data->linkname, hd.linkname, sizeof (hd.linkname));
data->linkname[100] = 0;
}
canonicalize (*name);
return GRUB_ERR_NONE;
}
#endif
return GRUB_ERR_NONE;
}
static struct grub_cpio_data *
static struct grub_archelp_data *
grub_cpio_mount (grub_disk_t disk)
{
struct head hd;
struct grub_cpio_data *data;
struct grub_archelp_data *data;
if (grub_disk_read (disk, 0, 0, sizeof (hd), &hd))
goto fail;
@ -276,7 +141,7 @@ grub_cpio_mount (grub_disk_t disk)
)
goto fail;
data = (struct grub_cpio_data *) grub_zalloc (sizeof (*data));
data = (struct grub_archelp_data *) grub_zalloc (sizeof (*data));
if (!data)
goto fail;
@ -289,293 +154,52 @@ fail:
return 0;
}
static grub_err_t
handle_symlink (struct grub_cpio_data *data,
const char *fn, char **name,
grub_uint32_t mode, int *restart)
{
grub_size_t flen;
char *target;
#ifndef MODE_USTAR
grub_err_t err;
#endif
char *ptr;
char *lastslash;
grub_size_t prefixlen;
char *rest;
grub_size_t size;
*restart = 0;
if ((mode & ATTR_TYPE) != ATTR_LNK)
return GRUB_ERR_NONE;
flen = grub_strlen (fn);
if (grub_memcmp (*name, fn, flen) != 0
|| ((*name)[flen] != 0 && (*name)[flen] != '/'))
return GRUB_ERR_NONE;
rest = *name + flen;
lastslash = rest;
if (*rest)
rest++;
while (lastslash >= *name && *lastslash != '/')
lastslash--;
if (lastslash >= *name)
prefixlen = lastslash - *name;
else
prefixlen = 0;
if (prefixlen)
prefixlen++;
#ifdef MODE_USTAR
size = grub_strlen (data->linkname);
#else
size = data->size;
#endif
if (size == 0)
return GRUB_ERR_NONE;
target = grub_malloc (size + grub_strlen (*name) + 2);
if (!target)
return grub_errno;
#ifdef MODE_USTAR
grub_memcpy (target + prefixlen, data->linkname, size);
#else
err = grub_disk_read (data->disk, 0, data->dofs, data->size,
target + prefixlen);
if (err)
return err;
#endif
if (target[prefixlen] == '/')
{
grub_memmove (target, target + prefixlen, size);
ptr = target + size;
ptr = grub_stpcpy (ptr, rest);
*ptr = 0;
grub_dprintf ("cpio", "symlink redirected %s to %s\n",
*name, target);
grub_free (*name);
canonicalize (target);
*name = target;
*restart = 1;
return GRUB_ERR_NONE;
}
if (prefixlen)
{
grub_memcpy (target, *name, prefixlen);
target[prefixlen-1] = '/';
}
ptr = target + prefixlen + size;
ptr = grub_stpcpy (ptr, rest);
*ptr = 0;
grub_dprintf ("cpio", "symlink redirected %s to %s\n",
*name, target);
grub_free (*name);
canonicalize (target);
*name = target;
*restart = 1;
return GRUB_ERR_NONE;
}
static grub_err_t
grub_cpio_dir (grub_device_t device, const char *path_in,
grub_fs_dir_hook_t hook, void *hook_data)
{
struct grub_cpio_data *data;
grub_disk_addr_t ofs;
char *prev, *name, *path, *ptr;
grub_size_t len;
int symlinknest = 0;
path = grub_strdup (path_in + 1);
if (!path)
return grub_errno;
canonicalize (path);
for (ptr = path + grub_strlen (path) - 1; ptr >= path && *ptr == '/'; ptr--)
*ptr = 0;
grub_dl_ref (my_mod);
prev = 0;
struct grub_archelp_data *data;
grub_err_t err;
data = grub_cpio_mount (device->disk);
if (!data)
{
grub_free (path);
return grub_errno;
}
len = grub_strlen (path);
data->hofs = 0;
while (1)
{
grub_int32_t mtime;
grub_uint32_t mode;
grub_err_t err;
err = grub_archelp_dir (data, &arcops,
path_in, hook, hook_data);
if (grub_cpio_find_file (data, &name, &mtime, &ofs, &mode))
goto fail;
if (!ofs)
break;
if (grub_memcmp (path, name, len) == 0
&& (name[len] == 0 || name[len] == '/' || len == 0))
{
char *p, *n;
n = name + len;
while (*n == '/')
n++;
p = grub_strchr (n, '/');
if (p)
*p = 0;
if (((!prev) || (grub_strcmp (prev, name) != 0)) && *n != 0)
{
struct grub_dirhook_info info;
grub_memset (&info, 0, sizeof (info));
info.dir = (p != NULL) || ((mode & ATTR_TYPE) == ATTR_DIR);
info.mtime = mtime;
info.mtimeset = 1;
if (hook (n, &info, hook_data))
{
grub_free (name);
goto fail;
}
grub_free (prev);
prev = name;
}
else
{
int restart = 0;
err = handle_symlink (data, name, &path, mode, &restart);
grub_free (name);
if (err)
goto fail;
if (restart)
{
len = grub_strlen (path);
if (++symlinknest == 8)
{
grub_error (GRUB_ERR_SYMLINK_LOOP,
N_("too deep nesting of symlinks"));
goto fail;
}
ofs = 0;
}
}
}
else
grub_free (name);
data->hofs = ofs;
}
fail:
grub_free (path);
grub_free (prev);
#ifdef MODE_USTAR
grub_free (data->linkname);
#endif
grub_free (data);
grub_dl_unref (my_mod);
return grub_errno;
return err;
}
static grub_err_t
grub_cpio_open (grub_file_t file, const char *name_in)
{
struct grub_cpio_data *data;
grub_disk_addr_t ofs;
char *fn;
char *name = grub_strdup (name_in + 1);
int symlinknest = 0;
if (!name)
return grub_errno;
canonicalize (name);
grub_dl_ref (my_mod);
struct grub_archelp_data *data;
grub_err_t err;
data = grub_cpio_mount (file->device->disk);
if (!data)
{
grub_free (name);
return grub_errno;
}
data->hofs = 0;
while (1)
err = grub_archelp_open (data, &arcops, name_in);
if (err)
{
grub_uint32_t mode;
int restart;
if (grub_cpio_find_file (data, &fn, NULL, &ofs, &mode))
goto fail;
if (!ofs)
{
grub_error (GRUB_ERR_FILE_NOT_FOUND, N_("file `%s' not found"), name_in);
break;
grub_free (data);
}
if (handle_symlink (data, fn, &name, mode, &restart))
else
{
grub_free (fn);
goto fail;
}
if (restart)
{
ofs = 0;
if (++symlinknest == 8)
{
grub_error (GRUB_ERR_SYMLINK_LOOP,
N_("too deep nesting of symlinks"));
goto fail;
}
goto no_match;
}
if (grub_strcmp (name, fn) != 0)
goto no_match;
file->data = data;
file->size = data->size;
grub_free (fn);
grub_free (name);
return GRUB_ERR_NONE;
no_match:
grub_free (fn);
data->hofs = ofs;
}
fail:
#ifdef MODE_USTAR
grub_free (data->linkname);
#endif
grub_free (data);
grub_free (name);
grub_dl_unref (my_mod);
return grub_errno;
return err;
}
static grub_ssize_t
grub_cpio_read (grub_file_t file, char *buf, grub_size_t len)
{
struct grub_cpio_data *data;
struct grub_archelp_data *data;
data = file->data;
return (grub_disk_read (data->disk, 0, data->dofs + file->offset,
@ -585,16 +209,11 @@ grub_cpio_read (grub_file_t file, char *buf, grub_size_t len)
static grub_err_t
grub_cpio_close (grub_file_t file)
{
struct grub_cpio_data *data;
struct grub_archelp_data *data;
data = file->data;
#ifdef MODE_USTAR
grub_free (data->linkname);
#endif
grub_free (data);
grub_dl_unref (my_mod);
return grub_errno;
}

1
grub-core/fs/newc.c
View file

@ -65,7 +65,6 @@ read_number (const char *str, grub_size_t size)
GRUB_MOD_INIT (newc)
{
grub_fs_register (&grub_cpio_fs);
my_mod = mod;
}
GRUB_MOD_FINI (newc)

2
grub-core/fs/odc.c
View file

@ -20,6 +20,7 @@
#include <grub/misc.h>
#define ALIGN_CPIO(x) x
#define MAGIC "070707"
struct head
{
@ -52,7 +53,6 @@ read_number (const char *str, grub_size_t size)
GRUB_MOD_INIT (odc)
{
grub_fs_register (&grub_cpio_fs);
my_mod = mod;
}
GRUB_MOD_FINI (odc)

278
grub-core/fs/tar.c
View file

@ -18,8 +18,15 @@
*/
#include <grub/misc.h>
#include <grub/disk.h>
#include <grub/archelp.h>
#define MODE_USTAR 1
#include <grub/file.h>
#include <grub/mm.h>
#include <grub/dl.h>
#include <grub/i18n.h>
GRUB_MOD_LICENSE ("GPLv3+");
/* tar support */
#define MAGIC "ustar"
@ -52,14 +59,277 @@ read_number (const char *str, grub_size_t size)
return ret;
}
#define FSNAME "tarfs"
struct grub_archelp_data
{
grub_disk_t disk;
grub_off_t hofs, next_hofs;
grub_off_t dofs;
grub_off_t size;
char *linkname;
grub_size_t linkname_alloc;
};
#include "cpio_common.c"
static grub_err_t
grub_cpio_find_file (struct grub_archelp_data *data, char **name,
grub_int32_t *mtime,
grub_uint32_t *mode)
{
struct head hd;
int reread = 0, have_longname = 0, have_longlink = 0;
data->hofs = data->next_hofs;
for (reread = 0; reread < 3; reread++)
{
if (grub_disk_read (data->disk, 0, data->hofs, sizeof (hd), &hd))
return grub_errno;
if (!hd.name[0] && !hd.prefix[0])
{
*mode = GRUB_ARCHELP_ATTR_END;
return GRUB_ERR_NONE;
}
if (grub_memcmp (hd.magic, MAGIC, sizeof (MAGIC) - 1))
return grub_error (GRUB_ERR_BAD_FS, "invalid tar archive");
if (hd.typeflag == 'L')
{
grub_err_t err;
grub_size_t namesize = read_number (hd.size, sizeof (hd.size));
*name = grub_malloc (namesize + 1);
if (*name == NULL)
return grub_errno;
err = grub_disk_read (data->disk, 0,
data->hofs + GRUB_DISK_SECTOR_SIZE, namesize,
*name);
(*name)[namesize] = 0;
if (err)
return err;
data->hofs += GRUB_DISK_SECTOR_SIZE
+ ((namesize + GRUB_DISK_SECTOR_SIZE - 1) &
~(GRUB_DISK_SECTOR_SIZE - 1));
have_longname = 1;
continue;
}
if (hd.typeflag == 'K')
{
grub_err_t err;
grub_size_t linksize = read_number (hd.size, sizeof (hd.size));
if (data->linkname_alloc < linksize + 1)
{
char *n;
n = grub_malloc (2 * (linksize + 1));
if (!n)
return grub_errno;
grub_free (data->linkname);
data->linkname = n;
data->linkname_alloc = 2 * (linksize + 1);
}
err = grub_disk_read (data->disk, 0,
data->hofs + GRUB_DISK_SECTOR_SIZE, linksize,
data->linkname);
if (err)
return err;
data->linkname[linksize] = 0;
data->hofs += GRUB_DISK_SECTOR_SIZE
+ ((linksize + GRUB_DISK_SECTOR_SIZE - 1) &
~(GRUB_DISK_SECTOR_SIZE - 1));
have_longlink = 1;
continue;
}
if (!have_longname)
{
grub_size_t extra_size = 0;
while (extra_size < sizeof (hd.prefix)
&& hd.prefix[extra_size])
extra_size++;
*name = grub_malloc (sizeof (hd.name) + extra_size + 2);
if (*name == NULL)
return grub_errno;
if (hd.prefix[0])
{
grub_memcpy (*name, hd.prefix, extra_size);
(*name)[extra_size++] = '/';
}
grub_memcpy (*name + extra_size, hd.name, sizeof (hd.name));
(*name)[extra_size + sizeof (hd.name)] = 0;
}
data->size = read_number (hd.size, sizeof (hd.size));
data->dofs = data->hofs + GRUB_DISK_SECTOR_SIZE;
data->next_hofs = data->dofs + ((data->size + GRUB_DISK_SECTOR_SIZE - 1) &
~(GRUB_DISK_SECTOR_SIZE - 1));
if (mtime)
*mtime = read_number (hd.mtime, sizeof (hd.mtime));
if (mode)
{
*mode = read_number (hd.mode, sizeof (hd.mode));
switch (hd.typeflag)
{
/* Hardlink. */
case '1':
/* Symlink. */
case '2':
*mode |= GRUB_ARCHELP_ATTR_LNK;
break;
case '0':
*mode |= GRUB_ARCHELP_ATTR_FILE;
break;
case '5':
*mode |= GRUB_ARCHELP_ATTR_DIR;
break;
}
}
if (!have_longlink)
{
if (data->linkname_alloc < 101)
{
char *n;
n = grub_malloc (101);
if (!n)
return grub_errno;
grub_free (data->linkname);
data->linkname = n;
data->linkname_alloc = 101;
}
grub_memcpy (data->linkname, hd.linkname, sizeof (hd.linkname));
data->linkname[100] = 0;
}
return GRUB_ERR_NONE;
}
return GRUB_ERR_NONE;
}
static char *
grub_cpio_get_link_target (struct grub_archelp_data *data)
{
return grub_strdup (data->linkname);
}
static void
grub_cpio_rewind (struct grub_archelp_data *data)
{
data->next_hofs = 0;
}
static struct grub_archelp_ops arcops =
{
.find_file = grub_cpio_find_file,
.get_link_target = grub_cpio_get_link_target,
.rewind = grub_cpio_rewind
};
static struct grub_archelp_data *
grub_cpio_mount (grub_disk_t disk)
{
struct head hd;
struct grub_archelp_data *data;
if (grub_disk_read (disk, 0, 0, sizeof (hd), &hd))
goto fail;
if (grub_memcmp (hd.magic, MAGIC, sizeof (MAGIC) - 1))
goto fail;
data = (struct grub_archelp_data *) grub_zalloc (sizeof (*data));
if (!data)
goto fail;
data->disk = disk;
return data;
fail:
grub_error (GRUB_ERR_BAD_FS, "not a tarfs filesystem");
return 0;
}
static grub_err_t
grub_cpio_dir (grub_device_t device, const char *path_in,
grub_fs_dir_hook_t hook, void *hook_data)
{
struct grub_archelp_data *data;
grub_err_t err;
data = grub_cpio_mount (device->disk);
if (!data)
return grub_errno;
err = grub_archelp_dir (data, &arcops,
path_in, hook, hook_data);
grub_free (data->linkname);
grub_free (data);
return err;
}
static grub_err_t
grub_cpio_open (grub_file_t file, const char *name_in)
{
struct grub_archelp_data *data;
grub_err_t err;
data = grub_cpio_mount (file->device->disk);
if (!data)
return grub_errno;
err = grub_archelp_open (data, &arcops, name_in);
if (err)
{
grub_free (data->linkname);
grub_free (data);
}
else
{
file->data = data;
file->size = data->size;
}
return err;
}
static grub_ssize_t
grub_cpio_read (grub_file_t file, char *buf, grub_size_t len)
{
struct grub_archelp_data *data;
data = file->data;
return (grub_disk_read (data->disk, 0, data->dofs + file->offset,
len, buf)) ? -1 : (grub_ssize_t) len;
}
static grub_err_t
grub_cpio_close (grub_file_t file)
{
struct grub_archelp_data *data;
data = file->data;
grub_free (data->linkname);
grub_free (data);
return grub_errno;
}
static struct grub_fs grub_cpio_fs = {
.name = "tarfs",
.dir = grub_cpio_dir,
.open = grub_cpio_open,
.read = grub_cpio_read,
.close = grub_cpio_close,
#ifdef GRUB_UTIL
.reserved_first_sector = 0,
.blocklist_install = 0,
#endif
};
GRUB_MOD_INIT (tar)
{
grub_fs_register (&grub_cpio_fs);
my_mod = mod;
}
GRUB_MOD_FINI (tar)

63
include/grub/archelp.h Normal file
View file

@ -0,0 +1,63 @@
/* archelp.h -- Archive helper functions */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2013 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef GRUB_ARCHELP_HEADER
#define GRUB_ARCHELP_HEADER 1
#include <grub/fs.h>
#include <grub/file.h>
typedef enum
{
GRUB_ARCHELP_ATTR_TYPE = 0160000,
GRUB_ARCHELP_ATTR_FILE = 0100000,
GRUB_ARCHELP_ATTR_DIR = 0040000,
GRUB_ARCHELP_ATTR_LNK = 0120000,
GRUB_ARCHELP_ATTR_NOTIME = 0x80000000,
GRUB_ARCHELP_ATTR_END = 0xffffffff
} grub_archelp_mode_t;
struct grub_archelp_data;
struct grub_archelp_ops
{
grub_err_t
(*find_file) (struct grub_archelp_data *data, char **name,
grub_int32_t *mtime,
grub_archelp_mode_t *mode);
char *
(*get_link_target) (struct grub_archelp_data *data);
void
(*rewind) (struct grub_archelp_data *data);
};
grub_err_t
grub_archelp_dir (struct grub_archelp_data *data,
struct grub_archelp_ops *ops,
const char *path_in,
grub_fs_dir_hook_t hook, void *hook_data);
grub_err_t
grub_archelp_open (struct grub_archelp_data *data,
struct grub_archelp_ops *ops,
const char *name_in);
#endif

178
include/grub/cbfs_core.h Normal file
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@ -0,0 +1,178 @@
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2008 Jordan Crouse <jordan@cosmicpenguin.net>
* Copyright (C) 2012 Google, Inc.
* Copyright (C) 2013 The Chromium OS Authors. All rights reserved.
*
* This file is dual-licensed. You can choose between:
* - The GNU GPL, version 2, as published by the Free Software Foundation
* - The revised BSD license (without advertising clause)
*
* ---------------------------------------------------------------------------
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
* ---------------------------------------------------------------------------
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ---------------------------------------------------------------------------
*/
#ifndef _CBFS_CORE_H_
#define _CBFS_CORE_H_
#include <grub/types.h>
/** These are standard values for the known compression
alogrithms that coreboot knows about for stages and
payloads. Of course, other CBFS users can use whatever
values they want, as long as they understand them. */
#define CBFS_COMPRESS_NONE 0
#define CBFS_COMPRESS_LZMA 1
/** These are standard component types for well known
components (i.e - those that coreboot needs to consume.
Users are welcome to use any other value for their
components */
#define CBFS_TYPE_STAGE 0x10
#define CBFS_TYPE_PAYLOAD 0x20
#define CBFS_TYPE_OPTIONROM 0x30
#define CBFS_TYPE_BOOTSPLASH 0x40
#define CBFS_TYPE_RAW 0x50
#define CBFS_TYPE_VSA 0x51
#define CBFS_TYPE_MBI 0x52
#define CBFS_TYPE_MICROCODE 0x53
#define CBFS_COMPONENT_CMOS_DEFAULT 0xaa
#define CBFS_COMPONENT_CMOS_LAYOUT 0x01aa
#define CBFS_HEADER_MAGIC 0x4F524243
#define CBFS_HEADER_VERSION1 0x31313131
#define CBFS_HEADER_VERSION2 0x31313132
#define CBFS_HEADER_VERSION CBFS_HEADER_VERSION2
#define CBFS_HEADER_INVALID_ADDRESS ((void*)(0xffffffff))
/** this is the master cbfs header - it need to be located somewhere available
to bootblock (to load romstage). Where it actually lives is up to coreboot.
On x86, a pointer to this header will live at 0xFFFFFFFC.
For other platforms, you need to define CONFIG_CBFS_HEADER_ROM_OFFSET */
struct cbfs_header {
grub_uint32_t magic;
grub_uint32_t version;
grub_uint32_t romsize;
grub_uint32_t bootblocksize;
grub_uint32_t align;
grub_uint32_t offset;
grub_uint32_t architecture;
grub_uint32_t pad[1];
} __attribute__((packed));
/* "Unknown" refers to CBFS headers version 1,
* before the architecture was defined (i.e., x86 only).
*/
#define CBFS_ARCHITECTURE_UNKNOWN 0xFFFFFFFF
#define CBFS_ARCHITECTURE_X86 0x00000001
#define CBFS_ARCHITECTURE_ARMV7 0x00000010
/** This is a component header - every entry in the CBFS
will have this header.
This is how the component is arranged in the ROM:
-------------- <- 0
component header
-------------- <- sizeof(struct component)
component name
-------------- <- offset
data
...
-------------- <- offset + len
*/
#define CBFS_FILE_MAGIC "LARCHIVE"
struct cbfs_file {
char magic[8];
grub_uint32_t len;
grub_uint32_t type;
grub_uint32_t checksum;
grub_uint32_t offset;
} __attribute__((packed));
/*** Component sub-headers ***/
/* Following are component sub-headers for the "standard"
component types */
/** This is the sub-header for stage components. Stages are
loaded by coreboot during the normal boot process */
struct cbfs_stage {
grub_uint32_t compression; /** Compression type */
grub_uint64_t entry; /** entry point */
grub_uint64_t load; /** Where to load in memory */
grub_uint32_t len; /** length of data to load */
grub_uint32_t memlen; /** total length of object in memory */
} __attribute__((packed));
/** this is the sub-header for payload components. Payloads
are loaded by coreboot at the end of the boot process */
struct cbfs_payload_segment {
grub_uint32_t type;
grub_uint32_t compression;
grub_uint32_t offset;
grub_uint64_t load_addr;
grub_uint32_t len;
grub_uint32_t mem_len;
} __attribute__((packed));
struct cbfs_payload {
struct cbfs_payload_segment segments;
};
#define PAYLOAD_SEGMENT_CODE 0x45444F43
#define PAYLOAD_SEGMENT_DATA 0x41544144
#define PAYLOAD_SEGMENT_BSS 0x20535342
#define PAYLOAD_SEGMENT_PARAMS 0x41524150
#define PAYLOAD_SEGMENT_ENTRY 0x52544E45
struct cbfs_optionrom {
grub_uint32_t compression;
grub_uint32_t len;
} __attribute__((packed));
#endif

1
include/grub/disk.h
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@ -46,6 +46,7 @@ enum grub_disk_dev_id
GRUB_DISK_DEVICE_ARCDISK_ID,
GRUB_DISK_DEVICE_HOSTDISK_ID,
GRUB_DISK_DEVICE_PROCFS_ID,
GRUB_DISK_DEVICE_CBFSDISK_ID
};
struct grub_disk;